13123335556 has 12 divisors (see below), whose sum is σ = 22967855568. Its totient is φ = 6561091112.

The previous prime is 13123335553. The next prime is 13123335559. The reversal of 13123335556 is 65553332131.

It is an interprime number because it is at equal distance from previous prime (13123335553) and next prime (13123335559).

It is a super-2 number, since 2×13123335556² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13123335551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90766 + ... + 185701.

It is an arithmetic number, because the mean of its divisors is an integer number (1913987964).

Almost surely, 2^13123335556 is an apocalyptic number.

It is an amenable number.

13123335556 is a deficient number, since it is larger than the sum of its proper divisors (9844520012).

13123335556 is a wasteful number, since it uses less digits than its factorization.

13123335556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288338 (or 288336 counting only the distinct ones).

The product of its digits is 121500, while the sum is 37.

Adding to 13123335556 its reverse (65553332131), we get a palindrome (78676667687).

The spelling of 13123335556 in words is "thirteen billion, one hundred twenty-three million, three hundred thirty-five thousand, five hundred fifty-six".